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JOHN C. IMLAY, OF PHILLIPSBURG, NEW JERSEY.

RATCl-l ET-=DRILL SPECIFICATION forming part of Letters Patent No. 31%,449, dated March 24, 1885.

(No model.)

T0 at whom it may concern.-

Be it known that I, JOHN C. IMLAY, of Phillipsburg, in the county of WVarren and State of New Jersey, have invented certain new and useful Improvements in Ratchet-Drills; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which- Figure l is a vertical sectional view of my improved compound ratchet-drill. Fig. 2 is aside elevation with one of the sides of the case removed. Fig. 3 is a top view of the pawl-frame and its levers or handles. Fig. 4 is a top view of the drill-case.

This invention relates to' improvements on ratchet-drills; and it consists in so constructing and combining the several devices which compose my drill that a continuous rotary motion is imparted to the drill stock or spindle by giving vibrating motion to a ratchetframe, as will be fully understood from the following description, when taken in connection with the annexed drawings.

A designates a hollow drill-case, which is made of two similar parts constructed so that when they are secured together by screws passed through lugs b 2), vertical spaces a c are left for allowing the handles of a pawlframe to be vibrated freely. Vertically through the center of this frame A passes a spindle or drill-stocl B, provided with collars d (I, one of which, d, is connected to the stock B by means of a screw, which enters freely a vertical groove in the stock. The other collar, d, is constructed with a socket to re ceive and hold in place a drilling-tool. The upper portion of the stock B is screw-threaded and provided with a screw-threaded socket having a center-point, O, and a handwheel, G, whereby the drill-bit can be fed downward as the work of drilling progresses.

On the drill-stock B, inside of the case A, is applied, by means of a screw or a feather and groove, a beveled spur-wheel, E, the teeth of which engage with beveled teeth F F, formed on the inner sides of two ratchetwheels, G G, which are free to turn on studs H H. These studs H H are rigidly secured to the sides of case A by means of inside fixed collars, n a, and outside nuts, i i.

J designates a frame or yoke, which has its bearings on the collars n a of the studs H H, and which is free to vibrate inside of the case A. This frame is provided with four pawls, 1', acted on by springs s, which keep the pawls in contact with the teeth of the ratchet-wheels G G, and two of them act on one of these wheels while two of them act on the other one. Thus it will be seen that when the frame J is vibrated by a person grasping either one or both of the detachable handles J, a continuous rotary motion in one direction will be transmitted to the drillstock B. I

It will be observed that the teeth of one ratchet-wheel are pitched in an opposite direction to the teeth of the other ratchet-wheel; also, that the spring-actuated pawls r for each ratchet-wheel are arranged on opposite sides ofthe vibrating frame.

I am aware that ratchet-drills have heretofore been invented wherein the drill-stocks receive continuous rotary motion from a lever receiving vibrating motion, and therefore I do not broadly claim the principle applied to a ratchet-drill.

Having described my invention,what I claim as new 1s 1. In a ratchetdrill wherein the drill-stock receives continuous rotary motion from a'lever to which is given vibrating motion, the combination of a case having studs fixed to it, the ratchet-wheels having beveled teeth on their inner sides, a beveled spur-wheel applied on the drill-stock and engaging with said beveled teeth, collars on the drill-stock, and a vibrating frame bearing springactuated pawls which engage with said ratchet-wheels and are adapted to receive one or two handles, all constructed and adapted to operate substantially in the manner and for the purpose described.

2. A ratchet-drill case composed of two parts secured together and having slots or spaces 0 c, studs having collars on them fixed t0 the sides of said case, a vibrating pawl- I In testimony that I claim the foregoing as bearing frame applied on the collars of said 'my own I affix my signature in presence of two studs, the ratchet-wheels and their gears, witnesses.

and a vertically-adjustable drillstock, all JOHN C. IMLAY. constructed and adapted to operate substan- Vitnessesztially in the manner and forthe purposes (le- 1 JOHN D. REED,

scribed. l THOMAS REYNOLDS. 

